查询词典 model t

Objective To observe the pathological changes and investigate the hepatocyte apoptosis relating with CYP2E1 in alcoholic liver diseaseof rat. Method the Model of Alcoholic liver Disease: Rats were randomly divided into model group(n=37)and control group(n=33). The dose of 40％ethanol was administerd at 8g/kg body weight by garage twice daily for 8 weeks in model group, and control group was received isovolume saline by gavage. End of 8th week, the activities of serum ALT and AST were detect by autobiochemistry instrument. The pathological changes of liver was observed under light microscope after HE staining, hepatocyte apoptosis was detected by the TUNEL method.

目的： 研究酒精性肝病细胞凋亡程度与细胞色素P4502E1表达的关系方法：用酒精灌胃法制备大鼠酒精性肝病模型，将70只wistar大鼠随机分为正常对照组(33只)和酒精灌胃组(37只)，连续灌胃8周后病理切片观察细胞凋亡程度，干化学法测定ALT、AST的含量变化，用PCR法测定细胞色素P450 2E1的表达变化。

The call developmental process of Psittacula agapornis consists of five instinct phases according to its call character. In the first phase （congenital cal1 phase, CCP, 0~12 day of age）, the juveniles only produce single syllable with short syllable length. The second phase（blank-model-forming phase,BMFP, 13~30 day of age） is important for formation of vocal learning pathways. During this phase, the calls characterized by more and longer syllables. In the third phase （call-model-forming phase,CMFP, 31~45 day of age）, the call development is guided by a model system for vocal learning, vocal learning is engendered so that some calls with multi-syllables with UP1 are produced, principal frequency has increased about by 920 cent, the number of note is double that of second phase. The short-term memories are transformed into long-term memories in the forth phase （call-feedback-learning phase,CFLP, 46~90 day of age）. The call of juveniles is a close match to tutor call which accompanied by double various sounds with BS and UP1, and more resonance components were formed. Second principal frequency has increased about by 970 cent, the number of note increases by 2.6~3.0 times. During the fifth phase （excellent call phase,ECP, after 91 d）, vocal motor pathway is developed and the calls are accompanied with most stable, harmonious vari-tone and complex repertoire.

牡丹鹦鹉的鸣声发育分为5个时期。0~12 d为先天性鸣声期，鸣声特征为以基本音为主音的单音节单音调声，声长短。13~30 d为空白模板形成期，鸣声特征为以基本音为主音的多音节单音调声，声长和音量显著性增加，表明发声学习通路开始形成。31~45 d为鸣声模板形成期，鸣声特征为以第1陪音（UP1）为主音的多音节单变调声，声长和音量显著性增加，主音频提升约920音分，涵盖的律音数增加1倍，表明发声学习模板逐渐形成，发声学习开始。46~90 d为鸣声反馈学习期，鸣声特征为以BS和UP1为主音的双变调声，声长和音量显著性增加，主音频涵盖的律音数增加2.6~3.0倍，第2主音频提升约970音分，表明稳定模板逐渐形成，短期记忆逐渐向长期记忆转化。91 d后为完美鸣声期，鸣声特征为以UP1为主音的复合变音调声，声长、音量、主音频的提升和涵盖的律音数都趋于平稳，鸣声稳定而和谐，表明发声运动通路基本形成。

The results show that NPP is larger in June and July than other growth periods, grass LAI and NPP change rapidly from May to June. Estimated error of 44 cases by the biomass model is less than 20%, which show that the biomass model is very good , the model can describe growing status. Photosynthesis and respiration are different because of different type grass , three types grass are more adaptive to desert environment and the biomass are also big, the grass types include Alhagi sparsifolia, Lycium ruthenicum and Reaumuria songarica. The grass biomass is influenced by many factors such as grass type, total cover and plant height et al.

结果表明，2005年牧草生长期内NPP的变化基本是6、7月份最大，其它月份较小，5～6月份是牧草叶面积变化比较大的时期，也是NPP变化比较显著的时期；生物量模型估算得到的44个样本的生物量误差基本都小于20%，说明模型能够反映牧草的实际生长状况；不同荒漠牧草对光的利用能力和对CO2同化能力有很大差异，骆驼刺、红砂、黑果枸杞是荒漠牧草生物量较大的牧草类型；牧草类型、牧草盖度以及平均高度是造成不同牧草产量相差较大的重要原因。

Means to set up a physics model and requests for abstraction, association, supposition , analogism, and so on in the process of setting up the model flexibly and vividly to meet and put forward in the light of the importance of physics model, which can partly promote the development of the thinking science and have important realistic meaning to the teaching research.

针对建立物理模型的重要性，提出了如何建立物理模型以及我们在建立物理模型的过程中要灵活地运用抽象、联想、假设、类比等方法。

A continuous damage model of concrete is proposed based on simple mechanical model. The couple of volume and deviatoric nonlinear hardening, anisotropical damage, direction effects and differential failure forms can be described by this model.

基于 一个简单机械模型发展了混凝土的连续介质损伤模型，它可描述包含体积和偏量非线性变形间的耦合、强化、各向异性损伤及其方向效应，以及不同的破坏模式。

According to rate process theory, slip theory of plasticity and principle of virtual work, the micromechanical model of soil creep are set up, the numerical solution of the model is given, the differences and similarilities between frequency distribution function of microplane and clay platelet are discussed and schematic computation flow of the model for fitting the test data of homogeneously stressed anisotropically consoildated clay specimens in an undrained creep test at constant volume are given.

以速率过程理论作为土质学与土力学间的桥梁，根据塑性滑动理论和虚功原理，从微观结构的角度，建立了反映粘性土宏观应力应变关系的微观力学模型，给出了微观力学模型数值解的近似表达式，讨论了微滑面与粘粒和团粒定向频率分布的异同，设计了一个拟合各向异性土不排水蠕变的计算流程。

In the cochlear model, the model of the anteroventral cochlear nucleus is used to get the sychrony spectrum, the model of the posteroventral cochlear nucleus is used to get the firing rate spectrum and to detect the pitch.

对于中枢听觉系统：提出一个上橄榄复合体到耳蜗外毛细胞的自适应反馈控制模型，这个反馈由同步谱制导，实现了对刺激频率的选择注意，自适应于环境和语音的变化。

3D nonlinear FEM with ADINA software is carried out to verify the proposed model. The results show that the present model is safe and credible for the design of uniform soil slope. The calculation model provides a new approach for earthquake analysis and antiseismic design of the structure protected by soil nailing.

最后，结合一案例进行了分析，并用大型非线性有限元软件ADINA对此计算模型进行了验证，结果表明这种计算模型对土质较均匀的边坡动力设计和分析是安全、可靠、合理的。

Concerning model experiment, the authors introduces the methods for the seeking of similarity criterion, the approximative modelling and the verification of model experiment, and practical similarity method is presented for the research of model experiment.

针对模型实验，较详细地介绍了寻求相似准则的方法、近似模化的具体方法和模型实验的验证方法，为今后从事模型实验研究工作提供了实用的相似方法。

When the gas flux is constant, the ratio of reduced resistance is improved with the increase of the water stream velocity. However, the relationship between the gas flux and the ratio of reduced resistance is more complex. When the water stream velocity is constant, if the gas flux is small in contrast, the effectiveness of reduced resistance is not obvious. But when the gas flux increased, the jetted gas will form """"archform"""" which will augment the shape resistance. In this condition, resistance could not be reduced and could even be increased, if the gas flux continues to be increased. So that there needs setting a baffle called step, which introduces the jetted gas into the turbulence boundary layer. In this case, the shape resistance may be fairly great. Besides, the waterline of model has also some effect on the ratio of reduced resistance, which acts on the size of wave. If waterline is deep, the wave could not affect the deployment of microbubble layer, so there is almost no effect on ratio of reduced resistance. However, the wave would affect distributing of microbubble layer under the model so that the gas could leak out from the two sides of model and directly affect the ratio of reduce resistance if the waterline is very small. Whether installing the dashplate or not has also the great influence on the effectiveness the ratio of reduced resistance. From the results of experiment, conclusion is that adding dashplate will greatly improve the effectiveness of reduced resistance.

当喷气量一定时，水流速度增大，减阻率提高；喷气量与减阻率之间的关系比较复杂，速度一定时，如果喷气量较小，减阻效果就比较差，但当喷气量增大的话，喷射出的气体就会形成一个&拱度&，增加了船模的形状阻力，在这种情况下最好采取断阶喷气，把气体引入到湍流边界层中，在这种情况下，船模的形状阻力比较大；船模的吃水对减阻率也有一定的影响，主要表现在波浪大小上，如果吃水较深，波浪影响不到微气泡层的分布，对减阻率不会造成太大影响，如果吃水较浅，波浪就会影响到微气泡层在船模底部的覆盖情况，可能会有部分微气泡从船模两侧泄漏，这样就直接影响到了减阻效果；是否安装压浪板，对减阻率也有较大的影响，从试验结果可以看出，在船模尾部加设了压浪板时，减阻效果明显得到改善。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。